Show last added albums

dashboard/src/app/els.service.ts

@@ -276,6 +276,39 @@ export class ElsService {
       .map(res => res.json().aggregations.genres.value);
   }
 
+  getLastAddedAlbums(): Observable<Bucket[]> {
+    return this.http
+      .post(this.elsUrl + 'song' + ElsService.ACTION_SEARCH,
+            JSON.stringify({
+              'query': {
+                  'range' : {
+                      'Date Added' : {
+                          'gte' : 'now-6M/d',
+                          'lte' : 'now/d'
+                      }
+                  }
+              },
+              'aggs' : {
+                  'album' : {
+                      'terms' : {
+                          'field' : 'Album.original',
+                          'size': 5
+                      }
+                  }
+              },
+              'size': 0
+          }), {headers: this.headers})
+      .map(res => res.json().aggregations.album.buckets)
+      .map((hits: Array<any>) => {
+        // TODO Refactor this duplicated code to a method
+        const result: Array<Bucket> = [];
+        hits.forEach((bucket) => {
+          result.push(bucket);
+        });
+        return result;
+      });
+  }
+
   private handleError(error: any): Promise<any> {
     console.error('An error occurred', error); // for demo purposes only
     return Promise.reject(error.message || error);